/**
 * Copyright (C) 2007 The AsyncMail Group <asyncmail@googlegroups.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.googlecode.asyncmail.smtpserver.core;

import com.googlecode.asyncmail.smtp.SMTPRequest;
import com.googlecode.asyncmail.smtp.SMTPResponse;
import com.googlecode.asyncmail.smtpserver.SMTPSession;

import java.util.Collection;

/**
 * Custom command handlers must implement this interface The command handlers
 * will be Server wide common to all the SMTPHandlers, therefore the command
 * handlers must store all the state information in the SMTPSession object
 */
public interface CommandHandler {

    /**
     * Handle the command
     */
    SMTPResponse onCommand(SMTPSession session, SMTPRequest command);

    /**
     * Return a Collection of implemented commands
     * 
     * @return Collection which contains implemented commands
     */
    Collection<String> getImplCommands();

}
